Multiple-wire-drawing machine.



v, 'M. J. A. VICAIRE.

" MULTiPLE WIRE.DRAWING MACHINE.

APPLICATION FILED' MAY 5. 1913.

- 1,281, 439Q Patented Oct. 15, 1918.

3 SHEETS-SHEET l.

Witnesses.

M. I. A. YICAIRE.

MULTlPU-I WiRE DRAWING MACHINE. APPLlCATlON FILED MAY 5. ma." 131,439,, Patented 0013151918; 3 SHEETS-SHEET2. j

Witnes I I i limenjar.

M. J. A. VICAIRE.

MULTIPLE WIRE DRAWING M NE.

APPLICATION FILED MAY 5.

1,281,439. Patented Oct. 15, 1918.

3 SHEETSSHEET 3.

MARIE JULES ANDRE VICAIRE, OF PARIS. FRANCE, ASSIGNOB, BY MESNE ASSIGN- MENTS. TO BRIDGEPORT BRASS COMPANY. OF BRIDGEPORT, CONNECTICUT. A COR- PORATION OF CONNECTICUT.

MULTIPLE-WIRE-DRAWING MACHINE.

1.281 .439. Specification of Letters Patent. Patented Oct. 15, 1918.

Application filed May 5, 1913. Serial No. 765,495.

To allwhomz't may concern: be the change in the work of the difierent F Be it known that I. Mann: .li'Lus Axum: drawing plates. Under these conditions in Yunnan. citizen of'the French Republic, re order to avoid breakage. the wire to be siding at Paris. Department of the Seine, drawn should be able to slide upon the in France, have invented certain new and drums around which it is wound.

useful Improvements in Multiple-Wire- This sliding of the wire on the drawing 60 Drawing Machines; and ldo hereby declare drums whil being drawn does not takethe following to be a full, clear, and exact" place without serious ditticulties. For when description of the invention, such as will enthe drawing drums are driven at a constant able others skilled in the art to which it apspeed. the reduction of the wire as it passes pertains to make and use the same. from one draw plate to the other will not 65 Th t, i ti h vfor its object, take place at a corresponding rate. since, due an arrangement for automatically regulating to unequal wear on the several dies or to multiple metal reducing machines for cold other reasons. the wire will be reduced more drawing metallic wires. bars, rods and the by onev die, than another, and. consequently,

like. and the construction of machines for a greater load will be placed on one draw 70 cold drawing a strip simultaneously at a pludrum than on another. with the result that rality of points along its length. the wire is either broken or caused to slip ln machines for multiple wire drawing about the heavily loaded drum, from which of the type herein described, difier ent porthere results a considerable increase in the tions of a continuous strip of wire are passed power required. Furthermore. part of the 75 simultaneously through several dies, so that lubricant which covers the wire being drawn in the same continuous operation the (11- is completely lost, the wear of the draw ameter of the wire is reduced at a plurality plates is more rapid and the wire which is of points by passing the wire througlrthe being drawn is roughened. Finally and it desired number of dies or draw plates. The is the principal evil of this system, it brings so continuous strip of wire is drawn through about a rapid destruction of the drawing the dies by power driven drawing drums drums and makes the. cost of maintenance l placed behind the die. about wlnch the wire of the machine very heavy. Th1s last disadis looped or coiled several times before it vantage is so important that these multiple passes onto the next die. machines have only up to now been employed In order that the operation of such a ma fordrawing line wires, the friction of the chine shall be completely satisfactory in larger wires under the tension which is respite of wear or unequal pressure on the quired to draw them through the draw 35 various draw plates in the course of the same plates rapidly rendering the drawing drawing operation, it isnecessary that the drums useless, peripheral speed of each of the drawing The sliding of the wire upon the drum drumsshould be able tobe constantly varied and the other disadvantages above menand should be at each instant inversely protioned are avoided by the arrangement which 40 portional to the cross section of the draw forms the subject. of the present invention.

plate which precedes it. The output of in which each drum is operated to deliver all the draw plates will then be at each inexactly the quantity of wire necessary to stain exactly the same and the drawing will feed the next drum. To this end, the wire be absolutely regular without jerking or that is being drawn is itself used to control 45 breaking the wire which is being drawn. the speed of the drawing drums, and each In practice it,- is believed that-prior to my of the drums is separately actuated by an invention this condition had not been realelectric motor having the property of deized. creasing considerably in speed when the load In almost all th multiple wire drawing increases. so that each variation in the ten- 50 machine heretofore devised where the drawsion of the wire modifies the speed of the ing drums are driven by mechanical devices motor in such a way that each drum delivers geared together, the speed of rotation of the exactly the quantity of wire necessary for varion drawing drums remains constant feeding the next drum. I obtain the desired during the drawing operation whatever may operation of each drum by actuating separately each of the drawing shafts or drums by an electric motor which has the characteristic that its speed reduces when the load increases. With motors having this charac- 5 teristic each variation in the tension of the wire will itself instantaneously alter the speed of the motors in such a manner that each'drum will deliver exactly the amount of wire necessary to feed the following drum, in such a manner that the, drawing will be-absolutely regular. I For this purpose-the motors whichcan be employed are thefollowing: v

Continuous currentseries, compound, or shunt wound motors with. resistance-inserted in the armature causing a diminution of the speed to occur automatically when the torque rises;

Also various alternating current motors having'a speed which varies inversely to the torque, namely: ,1 1 v Smgle phase, series commutator motors (simple series motors, compensated series motors, repulsion motors'and motors of the Latour type comprising the combination of a simple seriesmotor and a repulsion mo Also asynchronous poly-phase motors of the following types, namely motors with a wound rotor having resistances-inserted in tensionof-the wire which is being drawn.

will modify the speed of the motors.v

In the accompanying drawings:

" Figure 1 shows diagrammatically by way of example and for the sake of simplicity a drawing machine having only two elements.

Figs. 2 to 7 are diagrams of electrical connections according to the type of motors 5O ployed for operating thedrawing drums.

In Fig. 1, 2 is a drawing drum or shaft driven by a series or compound electric motor. The wire is rolled several times around 5 the drum 2. The drum being rotated draws the wire through the draw plate 1. The wire having been wound several times on the drum 2, unrolls at itsfree end in accordance with the rotation of the drum 2. This end after passing through the draw plate 3 is I secured to the drum 4 which is drivenby another series or compound motor and draws the wire by reason of its rotation. 1

It is clear that, if the respective crosssection of the draw plates are denoted by S the rotor either with constant resistance or motors have-of slowingdown considerably i.

having the property above described -emv of the length of the wire will be taken care of by the successive increase in the speed of the motors, and since the speed of each motor lS 'COIltI'O11ed to a largeextent by the variation in the tension of the wire, the wire a will be drawn through the draw plates without being at any time submitted to an excessive strain. a Under these conditions equilibrium; will be established from the starting of the mul-- tiple drawing. In fact, during the operation if the drumt has a tendency to deliver more than the drum 2 the wire acts instantaneously as a regulating means, for when the 'tensionof the section a, 6, increases, this increase in tension tends to drive the drum 2 and its motor by the drum 4, the load on the motor operating the dru'm iis thus increased, so that it tends to slow down while inversely the load onthe motor driving the drum 2 diminishes andits speeds tends to increase The equilibrium of the outputs is therefore automatically reestablished and without any 100 assistance on the part-of'the workman; the wire which is being drawn acts 'thereforeas' a regulating device forthespeedsof the mo-. tors. {I y Generally, in machines having rn passes, it

will be sufiicient to regulate the outputs of each of the elements considered as a single drawing machine in such a'manner that they increase slightly from the first pass to the last. Under these conditions in the operaning of the operation and will continue dur- 1 1 I ing working without any v intervention on the part of the workman.

This arrangementis completed by standard devices for causing the automatic arrest vof themotors when, for any reason what- 12 ever and particularly at the end of the drawing operation, their load falls below. apre- 7 determined limit. v Fig; 2 is a diagram showing the electrical connections for series motors operating dif- 1 ferent drawing drums. The main supply conductors are shown at 6, 'Wthe secondary] I conductor 8 is connected directly to the main 6, and the conductor 9 is connected to the main 7 through a starting rheostat 10. 1

. larly adapted series with cases by means Each of the armatures' 11 is mounted in series with its field. coil 12, all th m t rs b inn controlled by the samerheostat 10.

i 3 shows the connections for comoun d wound motors. The main conductors Being 6, 7, the secondary conductor 8 is connected directly to the'main 6 and the .sec-' ondary line 9 is connected to the3-ma1n 7 through the starting resistance 10. Each armature is connected in series with one of the windings 12 of its field and in parallel with the other winding 12 13 permit the excitation of the motors to be regulated in order to properly divide" the work between them; the starting. and stop t the-single starting rheostat 10.

Figs. 4 and pensated motors in which the compensation windings 13 and 13 are either arranged in v Fi s. 6 and 7 relate to repudsion motors and atour motors respectively.

The starting synchronous poly-phase motors either with wound or squirrel cage rotors by the simple closure of a switch.

The machine herein described, is particu:

round iron rods, etc., but it also is well adapted to reduce of various dimensions and of all forms of A cross-section.

I claimi 1. In an apparatus of the class described, a plurality of wire draw plates through which a -continuous strand of wire is threaded, means for advancing the strand of wire simultaneously through each of said plates, electric motors similarly wound for operating saidwire advancin means and for ex- 1 erting a continuous pulling force throughout through a large range of speed upon each portion of a large range otspeed said motors being so the wire being drawn,

1wound.as to decrease in speed with an increase in tension upon the portion. of the wire being advanced by its motor.

2. In an apparatus of the class described, at plurality of wire draw plates through which a continuous strand of wire is threaded, wire engaging drums for advancing the successive portions of the wire simultaneously through each of said plates, electric motors similarly wound for operating said drums to exert a continuous pulling force upon each portion of the wire being drawn, said motors being so wound as to decrease in speed as the load upon the drums increases, due to in crease in tension of the portion of the wire being advanced by its drum.

3. In a wire drawing machine, a plurality of wire draw plates through which a, con- Field rheostats of all the motors is obtained by means 4:. In a Wire drawi 5 relate to the case of comthe field windings (Fig. 4) or are short-circuited upon themselves (Fig.5).

isefl'ected in all the above of a single controller and for'' sion of the WIIG.

for drawing iron'wire and metal of any material and load, whereby the }tinuous strand of wire is threaded, .wire engaging drums about which-the wire is looped for advancing successive P01110118 of the strand simultaneously through said plates,

each successive portion of the wire extending in a, straight and undeflected line from the periphery of the drum from which-it is unwinding to the periphery of the drum upon which'it is wound, driving means for each of said drums constructed and arranged to exert acontinuous pulling force throughout a large rangeof speed upon each portion of the wire being drawn and to automaticallydecrease in speed with an increase in I N the tension of the wire.

machine, a plurality of" wire. draw plates t strand simultaneously through said plates, each successive portion of the wire extending next wire advancing neans, driving means for each of the wire advancing means, conrough which a contmuous' strand ofwire is threaded, means for advancing successive portions of the I structed and arranged to automatically decrease in speed with an increase in the ten- 5. Ina wire drawing machine, a plurality of wire draw plates through which a continuous strand of wire is threaded, Wire engagmg drums about which the wire is looped for advan ing successive portions of the strand simultaneously through said plates; each successive portion of the wireextendingin a straight and undeflected line from the-periphery of the drum from which it is unwound to the periphery of the drum upon which it is being wound, electric motors for driving each of 'said'drums to exert a continuous pulling force throughout a large 7 range of speed upon each portion of the wire being drawn, ed to decrease in speed with an increase of 6. In a metal reducing machine, a p111- rality of metal draw plates through which a continuous lengthot the metal to be drawn passes, drums about which the metal is looped for advancing successive portions of the metal simultaneously through said plates,

electric motors for driving said drums,

means acting through the armature of each drum-driving motor, whereby each said motors being adapttension of the wire auto-.11 vmatically controls the speed of the motors.

drums, each of said electric motors being constructed and arranged so that its armature varies the current through its motor to decrease its speed with an increase oi' load imposed thereon through the drum driving connections by variation of tension in the portion of the metal advanced by each drum, whereby the tension of the metal automatically controls the speed of the motors.

8. In a metal reducing machine, a plurality of metal draw plates through which a continuous length of the metal to be drawn passes, drums for advancing successive portions of the metal simultaneously through said plates, electric motors for driving said drums, having series field, windings whereby each motor is adapted to'automatically decrease in speed with an increase of load and to exert an appreciable ad 'anciug force upon each portion of the metal being drawn throughout a large range of speed, substantially as described.

9. The combination of metal working devices arranged in tandem-for simultaneously advancing a length of stock, a plurality of draw'plates through which the stock is advanced, a prime mover for driving one of said stock advancing devices a prime mover for the other device, connecting means for positively driving each of said devices from its prime mover, and a current controlled means for simultaneously controlling the speed of said prime movers, each of said prime movers being constructed and ar ranged to vary its speed directly and automatically with variations of tension in the stock transmitted to it through its connecting means, and independently of said simultaneously controlling means.

10. The combination of metal working devices arranged in tandem for simultaneous operation on a length of stock ted by one of said devices to the other. an electric motor for driving each of said devices. and adjust able means for controlling the speed of said electric motor. each of said motors being so wound as to decrease in speed with an increase of load on its reducing device and to exert a continuous pulling force throughout a large range of speed uponeach portion of the. stock being drawnjwithout actuation of sa'id spced-controlling means. whereby the speeds of the reducing devices are directly and automatically controlled by variation of the tension of the stock; substantially as described.

11. In an apparatus of the class de -ribed. a plurality of wire drawing plates through whicha continuous trand is threaded, means for advancing the stramtof wire simultaneously through each of said plates. each successive portion of the-wire extending and traveling in a straight and uudctlcctcd line from one wire advancing means to the next wire advancing means, electric motors similarly wound for operating said wire advancing means and for exerting a continuous pulling force throughout a large range of speed upon each of the portions of the wire being drawn, said motors being so wound as to decrease in speed with an increase in tension upon the portion of the wire being advanced by its motor.

In testimony whereof I attix my signature in presence of two witnesses.

MARIE JL'LES name vnauar.

\Vitnesses:

LUOIEN Mini )1 i-ixonu, EnniCK KLo'rz; 

